Interior design: Need more storage? Hm, might have to sleep on that.

Restoration Hardware’s catalogues might be getting bigger, but its furniture, if you can believe it, is shrinking. In 2012, the retailer responded to growing demand for lighter, leaner pieces by introducing a line of scaled-down furnishings. This year, its “Small Spaces” catalogue is organized by city and residence: Los Angeles Bungalow, Boston Brownstone, etc.

It’s a sharp strategy. Census data show that young people, often in search of job opportunities, are flocking to urban areas where the apartment is king. But among the many limitations of living in a 400-square-foot studio is the lack of storage options. To accommodate, retailers are capitalizing on a piece previously relegated to children’s rooms and college dorms: the storage bed.

“Storage beds have become a huge priority for us,” said Janice Simonsen, a spokeswoman for Ikea USA who has worked with the company for 20 years. “We’d always had under-bed storage options like bins and whatnot, but now people want built-ins. It’s cleaner, and it looks more expensive.”